CMF / CRF Details

CMF ID: 8186

Installation of fixed speed cameras

Description: Installation of fixed speed cameras on arterials limited access freeways

Prior Condition: No speed camera present

Category: Speed management

Study: Safety effects of fixed speed cameras - An empirical Bayes evaluation, Hoye, 2015

 
Star Quality Rating: 3 Stars   [View score details]
Rating Points Total: 80
Crash Modification Factor (CMF)
Value: 0.76
Adjusted Standard Error:
Unadjusted Standard Error: 0.245
Crash Reduction Factor (CRF)
Value: 24   (This value indicates a decrease in crashes)
Adjusted Standard Error:
Unadjusted Standard Error: 24.5
Applicability
Crash Type: All
Crash Severity: K (fatal),A (serious injury)
Roadway Types: Not specified
Street Type:
Minimum Number of Lanes: 2
Maximum Number of Lanes: 2
Number of Lanes Direction:
Number of Lanes Comment:
Crash Weather: Not specified
Road Division Type:
Minimum Speed Limit: 50
Maximum Speed Limit: 90
Speed Unit: km/h
Speed Limit Comment:
Area Type: Rural
Traffic Volume:
Average Traffic Volume: 8419 Annual Average Daily Traffic (AADT)
Time of Day: All
If countermeasure is intersection-based
Intersection Type:
Intersection Geometry:
Traffic Control:
Major Road Traffic Volume:
Minor Road Traffic Volume:
Average Major Road Volume :
Average Minor Road Volume :
Development Details
Date Range of Data Used: 1997 to 2013
Municipality:
State:
Country: Norway
Type of Methodology Used: Before/after using empirical Bayes or full Bayes
Sample Size (crashes): 101 crashes before, 42 crashes after
Sample Size (sites): 130 sites before, 130 sites after
Sample Size (site-years): 390 site-years before, 390 site-years after
Sample Size (miles): 124.4 miles before, 124.4 miles after
Other Details
Included in Highway Safety Manual? No
Date Added to Clearinghouse: Nov-10-2016
Comments: Medium section: 100m upstream and 1km downstream of camera location